All of tomcrypt.hash uses ByteSource
All of tomcrypt.mac uses ByteSource
ByteSource tries bytes before buffers
All of tom crypt.{pkcs1,pkcs5,utils} use ByteSource
All of tomcrypt.prng uses ByteSource
Most of tomcrypt.rsa crypt methods use ByteSource

Skipped key import.
Most of tomcrypt.ecc uses ByteSource

Skipped key import.